
<h1><span class="yiyi-st" id="yiyi-12">numpy.stack</span></h1>
        <blockquote>
        <p>原文：<a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.stack.html">https://docs.scipy.org/doc/numpy/reference/generated/numpy.stack.html</a></p>
        <p>译者：<a href="https://github.com/wizardforcel">飞龙</a> <a href="http://usyiyi.cn/">UsyiyiCN</a></p>
        <p>校对：（虚位以待）</p>
        </blockquote>
    
<dl class="function">
<dt id="numpy.stack"><span class="yiyi-st" id="yiyi-13"> <code class="descclassname">numpy.</code><code class="descname">stack</code><span class="sig-paren">(</span><em>arrays</em>, <em>axis=0</em><span class="sig-paren">)</span><a class="reference external" href="http://github.com/numpy/numpy/blob/v1.11.3/numpy/core/shape_base.py#L282-L350"><span class="viewcode-link">[source]</span></a></span></dt>
<dd><p><span class="yiyi-st" id="yiyi-14">沿着新轴连接数组的序列。</span></p>
<p><span class="yiyi-st" id="yiyi-15"><em class="xref py py-obj">axis</em>参数指定新轴在结果尺寸中的索引。</span><span class="yiyi-st" id="yiyi-16">例如，如果<code class="docutils literal"><span class="pre">axis=0</span></code>，它将是第一个维度，如果<code class="docutils literal"><span class="pre">axis=-1</span></code>，它将是最后一个维度。</span></p>
<div class="versionadded">
<p><span class="yiyi-st" id="yiyi-17"><span class="versionmodified">版本1.10.0中的新功能。</span></span></p>
</div>
<table class="docutils field-list" frame="void" rules="none">
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<tr class="field-odd field"><th class="field-name"><span class="yiyi-st" id="yiyi-18">参数：</span></th><td class="field-body"><p class="first"><span class="yiyi-st" id="yiyi-19"><strong>数组</strong>：array_like的序列</span></p>
<blockquote>
<div><p><span class="yiyi-st" id="yiyi-20">每个数组必须具有相同的形状。</span></p>
</div></blockquote>
<p><span class="yiyi-st" id="yiyi-21"><strong>axis</strong>：int，可选</span></p>
<blockquote>
<div><p><span class="yiyi-st" id="yiyi-22">输入数组沿其堆叠的结果数组中的轴。</span></p>
</div></blockquote>
</td>
</tr>
<tr class="field-even field"><th class="field-name"><span class="yiyi-st" id="yiyi-23">返回：</span></th><td class="field-body"><p class="first"><span class="yiyi-st" id="yiyi-24"><strong>堆叠</strong>：ndarray</span></p>
<blockquote class="last">
<div><p><span class="yiyi-st" id="yiyi-25">堆叠数组比输入数组多一个维。</span></p>
</div></blockquote>
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</tr>
</tbody>
</table>
<div class="admonition seealso">
<p class="first admonition-title"><span class="yiyi-st" id="yiyi-26">也可以看看</span></p>
<dl class="last docutils">
<dt><span class="yiyi-st" id="yiyi-27"><a class="reference internal" href="numpy.concatenate.html#numpy.concatenate" title="numpy.concatenate"><code class="xref py py-obj docutils literal"><span class="pre">concatenate</span></code></a></span></dt>
<dd><span class="yiyi-st" id="yiyi-28">沿现有轴连接数组序列。</span></dd>
<dt><span class="yiyi-st" id="yiyi-29"><a class="reference internal" href="numpy.split.html#numpy.split" title="numpy.split"><code class="xref py py-obj docutils literal"><span class="pre">split</span></code></a></span></dt>
<dd><span class="yiyi-st" id="yiyi-30">将数组拆分成等大小的多个子数组的列表。</span></dd>
</dl>
</div>
<p class="rubric"><span class="yiyi-st" id="yiyi-31">例子</span></p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="n">arrays</span> <span class="o">=</span> <span class="p">[</span><span class="n">np</span><span class="o">.</span><span class="n">random</span><span class="o">.</span><span class="n">randn</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">4</span><span class="p">)</span> <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">10</span><span class="p">)]</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">np</span><span class="o">.</span><span class="n">stack</span><span class="p">(</span><span class="n">arrays</span><span class="p">,</span> <span class="n">axis</span><span class="o">=</span><span class="mi">0</span><span class="p">)</span><span class="o">.</span><span class="n">shape</span>
<span class="go">(10, 3, 4)</span>
</pre></div>
</div>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="n">np</span><span class="o">.</span><span class="n">stack</span><span class="p">(</span><span class="n">arrays</span><span class="p">,</span> <span class="n">axis</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span><span class="o">.</span><span class="n">shape</span>
<span class="go">(3, 10, 4)</span>
</pre></div>
</div>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="n">np</span><span class="o">.</span><span class="n">stack</span><span class="p">(</span><span class="n">arrays</span><span class="p">,</span> <span class="n">axis</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span><span class="o">.</span><span class="n">shape</span>
<span class="go">(3, 4, 10)</span>
</pre></div>
</div>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="n">a</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">array</span><span class="p">([</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">3</span><span class="p">])</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">b</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">array</span><span class="p">([</span><span class="mi">2</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">4</span><span class="p">])</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">np</span><span class="o">.</span><span class="n">stack</span><span class="p">((</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">))</span>
<span class="go">array([[1, 2, 3],</span>
<span class="go">       [2, 3, 4]])</span>
</pre></div>
</div>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="n">np</span><span class="o">.</span><span class="n">stack</span><span class="p">((</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">),</span> <span class="n">axis</span><span class="o">=-</span><span class="mi">1</span><span class="p">)</span>
<span class="go">array([[1, 2],</span>
<span class="go">       [2, 3],</span>
<span class="go">       [3, 4]])</span>
</pre></div>
</div>
</dd></dl>
